/*
 * Copyright 2011-2012 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.sabayframework.channel.ram;

import org.sabayframework.channel.Lock;


/**
 * An array-backed Lock implementation.
 * 
 * @author Alex Antonau
 * */
public class ArrayLock<T> implements Lock<T> {

	private Object[] array;
	
	public ArrayLock(Object[] array) {
		super();
		this.array = array;
	}

	@Override
	public int size() {
		return array==null? -1 : array.length;
	}

	@SuppressWarnings("unchecked")
	@Override
	public T get(int index) {
		return (T) array[index];
	}

	@Override
	public void set(int index, T elem) {
		array[index] = elem;
	}

	@Override
	public Object[] toArray() {
		return array;
	}

	@Override
	public void unlock() {
		array = null;
	}

	@Override
	public void cancel() {
		array = null;
	}

}
